Shape Memory Connection Members for Brittle Downhole Tools
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Solution Overview
Problem
Connecting brittle structures, such as ceramics or hard metals, to other structures in downhole tools is challenging due to their difficulty in machining and the lack of reliable mechanical connections, particularly with threaded connections.
Innovation Solution
Utilizing shape memory materials that transition between states in response to stimuli like temperature or stress to facilitate connections between brittle structures without press-fits or gluing, allowing for secure attachment through dimensional changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional mechanical connection methods (threaded connections, press-fits, or gluing) are used to connect brittle structures, then the connection can be established, but the machining difficulty and reliability of the connection deteriorate
Solution Approach 1:
The patent utilizes shape memory materials that undergo parameter changes (dimensional changes) in response to temperature or stress stimuli. The connection member transitions between a first state with a first configuration and a second state with a second configuration, enabling easy assembly and secure connection without difficult machining operations on brittle structures.
Solution Approach 2:
The shape memory material undergoes phase transitions between different states (first state and second state) with different configurations. This phase transition capability allows the connection member to change its dimensional properties reversibly, facilitating connection to brittle structures without requiring complex machining while maintaining reliable connections.
2Ease of manufacture
If shape memory materials are used to facilitate connections, then the ease of manufacture and connection reliability improve, but the device complexity increases
Solution Approach 1:
The shape memory connection member is capable of self-actuation through stimuli-responsive dimensional changes. The material automatically transitions between configurations in response to temperature or stress, eliminating the need for complex external actuation mechanisms or multiple components, thereby improving ease of manufacture despite using advanced materials.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables reliable and precise connections between brittle materials in downhole tools, overcoming machining difficulties and ensuring durable assemblies.
Implementation Method 1
a body including a shape memory material configured to transition from a first state having a first configuration to a second state having a second configuration in response to application of a stimulus
Data Source
AI summary
A downhole valve system for use in a borehole is disclosed. The downhole valve system includes a first downhole component formed of a brittle material, a second downhole component, and a connection member. The connection member formed from a shape memory material and includes: an outer surface including an outer diameter; an inner surface including an inner diameter, one of the outer and inner diameter modifiable by applying a stimulus to the shape memory material; and a connection feature, complimentary of a connection feature of the second downhole component, formed on one of the outer surface and the inner surface. The connection member secured to the first downhole component at a corresponding surface of the one of the inner and outer diameter and to the second downhole component via the first connection feature and the second connection feature to connect the second downhole component to the first downhole component.